You'll have to move quickly to solve this riddle,
Because then you'll understand me and not get in a fiddle,
You will usually find me in something embedded,
It might be in skin or an object instead,
I am also a part of a popular sport,
Where a double is needed for a round to abort,
In a jungle setting, I might be spotted,
To administer my poison so prey can be thwarted.

Hint

In a swift manner, and suddenly so,
Has the answer not come to you?Hide